复杂体系大跨度门式刚架钢结构库房的设计与分析

以某货场库房一期工程为例,介绍了复杂体系大跨度门式刚架的结构设计。该工程结构复杂,主要部分为2×36m刚架,部分刚架跨度达到72m,另局部设有承重夹层。为使不同跨度刚架屋面变形协调,72m跨刚架下设托梁,设计中需要考虑主刚架与托梁在荷载作用下的协同工作问题:承重夹层梁跨度近30m,并有严格的限高要求,设计中考虑夹层梁与屋面梁之间设置腹杆,形成整体桁架受力,以满足承载力和变形的要求。该工程具有一定的代表性,可为今后类似工程的设计提供依据。

DESIGN OF STORE OF LARGE-SPAN PORTAL FRAME WITH COMPLEX SYSTEM

This paper investigates a warehouse project in Beijing,and discusses the design principle of large span portal frames with complex systemThe main rigid frames of this structure consists of two steel large span frames whose spans are both 36m,some of the frames even have 72m long span,and part of the structure has a suspended mezzanine floorThe supporting truss is applied under the 72m span frame in order to ensure the deflections between the frames of different spansThe integral action between the frames and the supporting truss to resist load is considered in the designThe span of the beams in mezzanine floor approximates 30m,and the beam depth is limited strictlyIn the design some columns are applied between the beams of mezzanine floor and the roof rafter to form a space frame and provide adequate loading capacity and stiffnessThis project provides basis for the design of similar structures